Title: Biosorption of Ag+ from aqueous solution by Streptomyces rimosus biomass

Authors: M.Z. Bakhti, A. Selatnia, G.A. Junter

Addresses: Departement de Genie Chimique, Ecole Nationale Polytechnique d'Alger, 10, avenue Pasteur, Belfort, EL-Harrach, Alger, Algeria. ' Departement de Genie Chimique, Ecole Nationale Polytechnique d'Alger, 10, avenue Pasteur, Belfort, EL-Harrach, Alger, Algeria. ' Universite de Rouen/CNRS, P.B.M, UMR 6522, F 76821 Mont-Saint-Aignan, Cedex, France

Abstract: The silver biosorption capacity of a Streptomyces rimosus biomass pretreated with NaOH was studied in the batch mode. Under optimal experimental conditions, a biosorption capacity of 63 mg Ag+ g−1 biomass was obtained. External mass transfer was found to be the controlling step in the overall sorption process. The equilibrium data poorly fitted the Langmuir and Freundlich model isotherms over the whole range of initial silver concentrations tested (10-250 mg L−1).

Keywords: silver biosorption; Streptomyces rimosus; wastewater treatment; batch processing; biomass; mass transfer; water pollution.

DOI: 10.1504/IJEP.2008.020799

International Journal of Environment and Pollution, 2008 Vol.34 No.1/2/3/4, pp.297 - 307

Published online: 16 Oct 2008 *

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